EP2984725A1 - Éolienne à gamme de tensions élargie - Google Patents

Éolienne à gamme de tensions élargie

Info

Publication number
EP2984725A1
EP2984725A1 EP14709702.6A EP14709702A EP2984725A1 EP 2984725 A1 EP2984725 A1 EP 2984725A1 EP 14709702 A EP14709702 A EP 14709702A EP 2984725 A1 EP2984725 A1 EP 2984725A1
Authority
EP
European Patent Office
Prior art keywords
voltage
transformer
wind
wind energy
expander
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP14709702.6A
Other languages
German (de)
English (en)
Other versions
EP2984725B1 (fr
Inventor
Heinz-Hermann Letas
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Senvion GmbH
Original Assignee
Senvion GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Senvion GmbH filed Critical Senvion GmbH
Publication of EP2984725A1 publication Critical patent/EP2984725A1/fr
Application granted granted Critical
Publication of EP2984725B1 publication Critical patent/EP2984725B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/40—Synchronising a generator for connection to a network or to another generator
    • H02J3/44—Synchronising a generator for connection to a network or to another generator with means for ensuring correct phase sequence
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/28—The renewable source being wind energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/76—Power conversion electric or electronic aspects
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems
    • Y04S20/222—Demand response systems, e.g. load shedding, peak shaving

Definitions

  • the invention relates to a wind energy plant with a wind rotor, a generator driven therewith for the generation of electrical energy and a connecting line for the delivery of electrical energy.
  • Wind farms are preferably built in locations with good wind conditions, especially on coasts, at sea or in mountainous regions, as they continue to spread and increase in performance. In many cases, these are areas with insufficient infrastructure, especially wind farms at sea (so-called offshore wind farms), where usually none at all
  • the invention is based on the object of expanding ei ⁇ ne wind turbine with respect to their voltage range, with faster switching times are to be achieved with little effort.
  • a driven ⁇ generator for generating electrical energy and a connecting line for delivering the electrical energy, possibly via a Anlagentransforma- tor
  • appssexpander is provided rich by means of an additional voltage sourceactsbe ⁇ rich the wind power plant expanded, wherein the stress ⁇ expander its own small transformer having a primary and a secondary winding and a switching mechanism, and wherein the small transformer is looped to the secondary winding in the connecting line, and the switching mechanism is connected to the primary winding of the small transformer and this switchable multistage controls.
  • the invention is based on the idea of bringing about an expansion of the voltage range by means of a voltage expander consisting of an additional small transformer with a switching mechanism, in which the wind energy plant can be operated.
  • a switching mechanism of the small transformer is here switched in multiple stages, wherein depending on the circuit of the stages a more or less large or directionally different voltage shift is achieved. Since the small transformer is looped according to the invention in the connecting cable between the wind turbine and the grid, he can increase the voltage of the wind turbine in this way by inducing equal to the output of the wind turbine voltage an additional voltage, or ernied ⁇ rigen by reversing the sign of the wind turbine a Induced voltage.
  • a special feature of the invention is that, thanks to its arrangement along the connecting line, a transformer is sufficient, the power of which can be made significantly smaller than the power of the wind energy plant.
  • Small transformer is therefore referred to as a "small transformer.”
  • the design size of this small transformer is only dependent on the desired voltage swing of the voltage expander If, for example, an expansion of 10% based on the nominal value, the small transformer needs only a power of about 10% of rated power of the wind turbine.
  • SEN arrangement results in not only a multi-level and customized expansion of the voltage range of the wind turbine, but this succeeds on frappie- rend frugal way, namely with a power expander, whose small transformer need only a fraction of the rated power of the wind turbine. This can be achieved with very little additional effort a considerable extension ⁇ tion of the voltage range of the wind turbine.
  • Small transformer is understood to mean an additional, self-powered transformer which is looped into the connection line between the wind power plant or its plant transformer on the one hand and a grid connection point in the wind energy plant on the other hand.
  • the grid connection point may be a connection ⁇ point of the wind turbine at a park internal power han ⁇ spindles or a transfer point to a higher-energy transmission network.
  • a zero stage is provided.
  • a plurality Kleintransformato ⁇ ren are arranged in series in the connecting line.
  • a larger number of stages can be provided according to the number of small transformers, so that an adjustment of the voltage range by means of voltage expander over a larger area can be done on the one hand, but on the other hand also a finer gradation and thus Anpas ⁇ solution to the respective conditions is possible.
  • the small transformers can each be designed similarly, so that they each have the same additional
  • Small transformers are designed with different sizes, so that they generate different voltages. Then a combination can cover an even larger voltage range; For example, in the arrangement of three small transformers in the sense of 1: 2: 4, eight different voltage levels of 0-7 can be provided for the voltage expander.
  • a small transformer according to the present invention is characterized in that it is only designed for a Leis ⁇ tung, which is significantly less than the nominal power of the wind turbine. This is perfectly adequate from the be ⁇ already above reasons, thus the voltage expander can achieve a corresponding increase in the voltage range of the wind turbine. High costs or unnecessary space requirements due to oversizing are thus avoided.
  • the small transformer has a power that is at most H of the rated power of the wind turbine.
  • the voltage struc- Expander invention insbesonde ⁇ re net too, and that is with regard to the already numerous existing wind farms is of great importance, for retrofit for existing wind turbines or wind farms.
  • the power of the small transformer is propor tional to the additional voltage, the additional voltage is based on the rated voltage.
  • the voltage expander is designed so that it can be separated with its small transformer via contactors of the connecting cable. That when the voltage Expander in normal operation is not required when voltages at around the rated voltage thus can be reached, the voltage Expander is ineffective and thus losses are reduced, in particular supply losses by Studentstra ⁇ the small transformer. Although these losses are due to the small dimensions of the small transformer according to the invention anyway low, but also means avoiding these small losses an increase in efficiency of the wind turbine.
  • a separate load stage is preferably provided. It ensures that even when switching is always a load on the small transformer is switched on. This counteracts the risk of impermissibly high voltage peaks during switching.
  • the voltage expander is expediently designed so that the small transformer is installed combined with the plant transformer.
  • the small ⁇ transformer is further designed as a separate (possibly changeable) component whose electrical connection is looped into the plant transformer.
  • the additional voltage source formed by the Kleintrans ⁇ formator high voltage is connected tig to the plant transformer. This is preferably done at medium voltage, in such a way that the small transformer is integrally Schlos ⁇ sen within a medium-voltage winding of the transformer system.
  • the small transformer is connected on the medium voltage side to a star point of the plant transformer. Both embodiments offer the advantage that the small transformer is designed in combination with the medium-voltage side. This not only saves installation space, but also means effective short-circuit protection of the small transformer without further structural measures, since the short-circuit protection is already effected by the medium-voltage winding of the system transformer ⁇ .
  • a preferred embodiment of the small transformer is a stray field transformer having a short-circuit voltage u k of at least 0.10, preferably of at least 0.15. It is advantageous if the primary winding of the small transformer is wound over the secondary winding. Proven particularly, it has to provide the leakage field transformer having disk coils, in particular, the on-layer transformer ⁇ are preferably on distant legs of a transformer core disposed, and / or are formed as webs in the transformer core. For the core vorzugswei ⁇ se magnetic sheets are used with hard saturation characteristic. Furthermore, the coils are expediently arranged so that they do not form an air transformer. An unwanted magnetic coupling is avoided.
  • the switching mechanism of the voltage expander is actuated depending on voltage and / or reactive power. It has proven particularly useful if the rear derailleur is actuated as a function of both parameters.
  • a regulator for the clamping ⁇ voltage and / or reactive power is provided for this purpose preferably, detects the voltage as a control variable and / or the reactive power in the connection line. This detection advantageously takes place on a wind energy plant remote, that is to say network side, referring to the voltage expander according to the invention. Thus, a high accuracy is achieved in adjusting the ⁇ he wished extended voltage range.
  • the invention further extends to a wind farm with several wind turbines, which are connected to a parking network, which in turn is connected via a coupling line to a transmission network, wherein according to the invention a central voltage expander is provided which by means of an additional voltage source and a switching mechanism as described above, provides for the expansion of the voltage range of the wind farm as a whole.
  • a central voltage expander is provided which by means of an additional voltage source and a switching mechanism as described above, provides for the expansion of the voltage range of the wind farm as a whole.
  • ⁇ as is to a park controller for the voltage and / or reactive power provided, which detects as a controlled variable voltage or reactive power in the coupling line, and compensates by the central voltage expander.
  • this detection takes place on the remote side of the voltage expander, so on the side to the transmission network.
  • a switching state of the switching mechanism of the central voltage expander is applied to a Störssennvor facedung the parking controller.
  • a Störssennvor facedung the parking controller For a quiet Heidelberg Germany ⁇ hold is achieved, so that an existing voltage ⁇ regulation of the wind farm harmoniously cooperates with the central voltage expander according to the invention.
  • the wind farm to one or more Windener ⁇ gieanlagen that have a voltage expander as described above. This further optimizes the voltage range and the adjustment range.
  • FIG. 9 shows a diagram relating to the control structure in a wind farm with wind turbines according to the invention. Details of the control for a device according to FIG. 9;
  • FIG. 11 is a characteristic diagram for the operation of the wind power plant with the voltage modulator according to the invention.
  • Fig. 12 a sectional view of a stray field transformer.
  • the wind energy plant shown in Fig. 1 and provided in its entirety by the reference numeral 1 comprises a gondola 11 pivotally mounted on a tower 10 in the azimuth direction at the upper end of the tower 10.
  • the nacelle 11 has at one of its end faces a rotatably mounted wind rotor 12 with Rotor blades 13 on. This drives via a shaft (not shown) to a generator 14 with a converter 15 for generating electrical energy, which is delivered via a line 17 with a plant transformer 2 of the wind turbine to an in-park network 9.
  • the operation of the wind turbine 1 is monitored by a Control 8, which is arranged in the nacelle 11. It is connected via communication lines (not shown) to a parking master 7 and / or to higher-level control devices (not shown), in particular the network operator.
  • the wind turbine 1 supplies the electrical energy at a low voltage level which is typically in the range of 600-1000V. For transmission, and this also applies to the transmission via the park internal network 9, however, higher voltages are regularly required, namely those in the medium voltage range, eg. 20 kV.
  • the plant ⁇ transformer 2 is provided on or in the wind turbine 1.
  • the voltage in the park-internal network 9 can fluctuate, and the wind turbine 1 has to follow the voltage fluctuation according to its transformer 2.
  • Next is to provide reactive power from the wind turbine on Anfor ⁇ alteration, either as leading or lagging reactive power.
  • known wind turbines 1 can provide these, but not always over the entire required voltage range.
  • 17 of the wind power plant 1 is looped to the network 9, a voltage expander 3 in the terminal ⁇ line.
  • a voltage expander 3 in the terminal ⁇ line.
  • the dargestell ⁇ th in Fig. 1 embodiment it is on the co telnapsseite the transformer 2, between the transformer 2 and the network 9.
  • the voltage range of the expander 3 is used to expand the voltage range of the wind turbine 1 on the network 9, so as to meet even more stringent requirements of the grid operator with respect to strength of Wind energieanla ⁇ conditions against voltage fluctuations while providing reactive power.
  • the voltage expander 3 comprises a small transformer 30 having a primary winding 31 and a secondary winding 32 and a switching mechanism 33.
  • the secondary winding 32 is looped into the connecting line 17 between wind turbine 1 and network 9, in the embodiment shown in Figures 1 and 2 - he imagines ⁇ already mentioned - on the network side, so the medium-voltage level.
  • the primary winding 31 is connected to the switching mechanism 33. sen, and is supplied by this with electrical energy which is supplied to the switching mechanism 33 via a terminal 34.
  • the supply of the terminal 34 in turn can be done by the network 9, by the wind turbine 1 itself or by any other source, this source then has to be adjusted with respect to their frequency and phase to the voltage present in the network.
  • FIG. It shows a three-stage-switching switch ⁇ factory 33, with the switching stages MINUS ZERO and PLUS.
  • a PLUS ⁇ additional voltage for the small transformer 3 is tet umanschal- from the voltage expander 3, so that the total voltage of the wind turbine 1 increases.
  • the voltage output of the wind turbine 1 is reduced by an amount in the entspre ⁇ sponding position MINUS.
  • the amount of additionally applied by the small transformer 30 voltage U 2 is determined by the transmission ratio between the primary coil 31 and Se ⁇ secondary coil 32.
  • the primary coil 31 is supplied with a voltage Ui from the switching mechanism 33, which in turn draws its electrical energy from one of his Supply connection 34 connected supply transformer 4, which in turn is fed by the wind turbine 1 itself with ei ⁇ ner voltage U3 via the supply line 17 (the supply is not shown in Fig. 3 for reasons of clarity).
  • the load stage 5 comprises egg ⁇ NEN operation switch 50 and a load resistor 51.
  • the operation switch 50 is closed, and hence the resistor 51 as Load switched to the primary winding 31.
  • the switch pairs 35, 36 and 35 ', 36' or the switch 37 can then be operated without the primary winding 31 is free of load or whose circuit is interrupted. After the new switching state of the derailleur 33 is reached, the operation switch 50 is opened again and thus the load resistor 51 is disconnected.
  • FIG. 4 shows a further exemplary embodiment, which differs from that shown in FIG. 3 essentially in that a small transformer 30 'with a second pair of primary and secondary coils 31', 32 'is provided.
  • the switching mechanism 33 ' is also entspre ⁇ accordingly modified.
  • the additional voltage added by the voltage expander 3 can be varied in five stages. This allows a larger or finer adjustment.
  • the small transformer 30, 30 'of the voltage expander is designed as a separate element. However, this is not he ⁇ required. It may be appropriate to integrate the small transformer in the plant transformer 2 of the wind turbine 1.
  • FIG. 5 A first exemplary embodiment of this is illustrated in FIG. 5 on the basis of a three-phase diagram.
  • the transformer 2 has the switching group Dyn5.
  • the primary windings 21 are arranged, to which the wind turbine 1 is connected.
  • the secondary windings In the middle or in the right area are the secondary windings arranged, wherein the secondary windings are in two parts ⁇ leads are with the two parts 22, 22 '.
  • FIG. 6 A further alternative embodiment is illustrated in FIG. 6 by means of a transformer of the switching group YNd7yn0.
  • the transformer On the left side low-voltage side, the transformer has a primary winding 21 for each phase strand.
  • the transformer On the right in the middle dargestell ⁇ th medium voltage side, the transformer also has a secondary winding 22 for each phase strand, which are brought together via a star point 24. Between the secondary coils 22 and the star point 24, two secondary coils 32, 32 'of the small transformer 30' are arranged in each phase strand.
  • the transformer has a compensation winding 25.
  • integration of the secondary coils 22, 22 'of the small transformer 30' into the system transformer 2 is achieved in this exemplary embodiment.
  • the small transformer 30 ' on the (low voltage side shown in the figure on the left) connected.
  • the transformer has primary windings 21 on the low-voltage side and secondary windings 22 on the medium-voltage side. Between the primary windings 21 and the wind energy plant 1 feeding them, two secondary windings 32, 32 'of the small transformer 30' are arranged in each phase strand.
  • This exporting approximately ⁇ for example with a two-winding transformer having a primary winding and a secondary winding for each phase can be extended to a three-winding transformers ⁇ tor with two primary windings and a secondary winding for each phase.
  • Such an embodiment with egg ⁇ nem transformer of the switching group Dyn5yn5 is shown in Fig. 8.
  • two sets of primary windings 21, 23 are provided, which are at different voltage levels of, for example, 660 V and 950 V. This makes it possible to operate the much of the power transmitted stator of the generator 14 of the wind turbine 1 with a higher clamping ⁇ voltage level as the only a smaller part of the power transmitted rotor of the generator 14. Since both the primary winding 21 as well as for the additional Primary winding 23 are each a separate set of secondary coils 32, 32 'and 34, 34' of the small transformer 30 'pre ⁇ see, so can be achieved in this embodiment, the expansion of the voltage range according to the invention.
  • Fig. 9 The interaction ofistssexpander 3 on the one hand and a voltage control in a wind farm with multiple wind turbines 1 on the other hand is shown in Fig. 9.
  • the wind turbine 1 is shown, which via its plant transformer 2 arranged thereon with voltage expander 3 electrical power emits in a park internal network 9, to which further wind ⁇ energy plants (not shown in Fig. 9) are connected.
  • the in-park network 9 is also connected to a high-voltage transformer 2 * for delivering electrical power to a long-distance transmission network 99.
  • For the high-voltage transformer 2 * is also aponssexpander 3 * is provided.
  • a voltage regulation may be provided, which is part of the controller 8 of the wind turbine. It has an input 80 for actual values of the voltage and an input 81 for corresponding desired values. The actual values are detected by means of sensors 83 for voltage and current. They are arranged in the illustrated embodiment on the low-voltage side of the plant ⁇ transformer 2. Alternatively, however, can also be provided that they are arranged on the medium voltage side of the transformer 2 on ⁇ position as sensors 83 '. Furthermore, the wind farm in its Parkmaster 7 has a voltage regulation for the entire wind farm. It also has two inputs, an input 70 for actual values and an input 71 for setpoints.
  • the actual values for voltage and current in the wind farm are detected by means of sensors for voltage and current 73, which are arranged on the medium-voltage side of the high-voltage transformer 2 *.
  • the disturbance variable on the circuit unit 6 preferably has a differential element 62, which determines a voltage deviation between the actual voltage at the input 60 and the setpoint voltage at the input 61.
  • the resulting difference voltage value AU is applied to a characteristic element 63, which is dependent on a given seen working range 18 of the wind turbine determines depending on the voltage deviation, a value for a reactive current to be set. This value is output by the characteristic module 63 and applied to the input for disturbance variable connection 86 of the voltage regulator 8 of the wind energy plant 1.
  • a similar circuit may be provided for the clamping ⁇ voltage regulator 7 of the parking master.
  • FIG. 11 shows an example of a requirement spectrum defined by a network operator, namely for outputting which capacitive or inductive reactive power in which voltage range the wind energy plant must be capable (represented by a thick dashed line 98). Plotted on the abscissa is the reactive power ⁇ tung, and is plotted on the ordinate, the required reactive power for the respective voltage range.
  • a working area 18 of the wind turbine 1 according to the embodiment of the invention. It is apparent that the bordered by the solid line work area 18 does not completely cover the area defined by the line 98 gestrichel ⁇ te request area.
  • the wind energy plant 1 is not sufficient in its initial form to meet the require ⁇ approximations, such as are prepared by the dashed area 98th
  • the undervoltage range in the lower left quadrant can not be sufficiently maintained, and further, the overvoltage range is not sufficiently covered by both capacitive and inductive reactive power.
  • the voltage expander 3 is connected to the stage circuit MINUS. This reduces the voltage of the wind power plant to the applied voltage of the expander (negative in this case) voltage U 2, whereby the lower-voltage ⁇ limit by a shaded area down shifts. It can be seen that the wind energy plant 1 can thus comply with the required under-voltage range.
  • the wind turbine 1 can not provide the required overvoltage when requesting capacitive reactive power (the dashed line according to the requirements 98 is above the native working range 18 of the wind turbine 1).
  • the invention is switched as needed in this Quadran ⁇ th voltage expander 3 by means of the switching mechanism 33 in position PLUS, so that the auxiliary voltage U2 is added (in this case positive).
  • ⁇ Theistsbe rich thus shifts upwards accordingly, as visualized by the shaded area in the upper left quadrant.
  • Fig. 12 is a sectional view of a stray field transformer as a possible embodiment of the small ⁇ transformer 30 is shown.
  • the stray field transformer comprises a core 39 composed of magnetic plates with a hard saturation characteristic, on which a secondary winding 32 is wound first, and in turn a primary winding 31 is then wound onto these.
  • the resulting magnetization curve and the energy stored in the magnetic field between secondary coil 32 and primary coil 31 are shown schematically in the diagram in the lower half of the figure. This will be a

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

L'invention concerne une éolienne composée d'un rotor éolien (12), d'une génératrice (14) entraînée par ce dernier et destinée à produire de l'énergie électrique, et d'une ligne de raccordement servant à la distribution de l'énergie électrique éventuellement par l'intermédiaire d'un transformateur (2) de ladite éolienne. Selon l'invention, un élargisseur de gamme de tensions (3) est destiné à élargir la gamme de tensions de l'éolienne au moyen d'une source de tension supplémentaire, ledit élargisseur de gamme de tensions (3) comprenant un petit transformateur (30) propre, composé d'un enroulement primaire et d'un enroulement secondaire (31, 32), et un mécanisme de commutation (33), le petit transformateur (30) étant inséré dans la ligne de raccordement (17) avec l'enroulement secondaire (32), et le mécanisme de commutation (33) étant relié à l'enroulement primaire (31) du petit transformateur (30) et commandant ledit enroulement de façon à permettre une commutation par gradins. On obtient ainsi un élargissement par gradins de la gamme de tensions de l'éolienne, le petit transformateur n'ayant besoin que d'une fraction de la puissance nominale de l'éolienne du fait de son agencement en longueur dans la ligne de raccordement.
EP14709702.6A 2013-04-09 2014-03-13 Éolienne à plage de tension étendue Active EP2984725B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013206241.9A DE102013206241A1 (de) 2013-04-09 2013-04-09 Windenergieanlage mit erweitertem Spannungsbereich
PCT/EP2014/055009 WO2014166694A1 (fr) 2013-04-09 2014-03-13 Éolienne à gamme de tensions élargie

Publications (2)

Publication Number Publication Date
EP2984725A1 true EP2984725A1 (fr) 2016-02-17
EP2984725B1 EP2984725B1 (fr) 2019-05-08

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP14709702.6A Active EP2984725B1 (fr) 2013-04-09 2014-03-13 Éolienne à plage de tension étendue

Country Status (7)

Country Link
US (1) US10389137B2 (fr)
EP (1) EP2984725B1 (fr)
CN (1) CN105556780B (fr)
DE (1) DE102013206241A1 (fr)
DK (1) DK2984725T3 (fr)
ES (1) ES2747846T3 (fr)
WO (1) WO2014166694A1 (fr)

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DE102015009741A1 (de) * 2015-07-31 2017-02-02 Senvion Gmbh Windenergieanlage mit spannungsgeregelter Eigenbedarfsversorgung
DE102015220220A1 (de) * 2015-10-16 2017-04-20 Siemens Aktiengesellschaft Blindleistungskompensationseinrichtung sowie Verfahren zum Betreiben einer Blindleistungskompensationseinrichtung
DE112016006268T5 (de) * 2016-01-21 2018-10-18 Vacon Oy Frequenzumrichter mit LCL-Netzleistungs- und Gleichtaktfilter
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DE102017004289A1 (de) * 2017-05-04 2018-11-08 Senvion Gmbh Niederspannungsgeregelte Windenergieanlage mit verbessertem Kurzschlussverhalten
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US10389137B2 (en) 2019-08-20
CN105556780B (zh) 2020-06-26
DE102013206241A1 (de) 2014-10-09
ES2747846T3 (es) 2020-03-11
DK2984725T3 (da) 2019-08-12
CN105556780A (zh) 2016-05-04
US20160308368A1 (en) 2016-10-20
WO2014166694A1 (fr) 2014-10-16
EP2984725B1 (fr) 2019-05-08

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